org-export-filter-src-block-functions

org-export-filter-src-block-functions is a variable defined in `ox.el'.
Its value is

nil

• This variable may be risky if used as a file-local variable.

Documentation:
List of functions applied to a transcoded src-block.
Each filter is called with three arguments: the transcoded data,
as a string, the back-end, as a symbol, and the communication
channel, as a plist. It must return a string or nil.